diff --git a/Heat_method_3/test/Heat_method_3/heat_method_intrinsic_surface_mesh_test.cpp b/Heat_method_3/test/Heat_method_3/heat_method_intrinsic_surface_mesh_test.cpp
index dc4e20339ed..5e80773568e 100644
--- a/Heat_method_3/test/Heat_method_3/heat_method_intrinsic_surface_mesh_test.cpp
+++ b/Heat_method_3/test/Heat_method_3/heat_method_intrinsic_surface_mesh_test.cpp
@@ -1,3 +1,5 @@
+#define CGAL_TESTSUITE
+
 #include <CGAL/Simple_cartesian.h>
 #include <CGAL/Surface_mesh.h>
 #include <CGAL/Polyhedron_3.h>
@@ -30,6 +32,8 @@ typedef CGAL::Heat_method_3::Heat_method_3<Idt,Kernel, Idt::Vertex_distance_map>
 typedef CGAL::Heat_method_3::Heat_method_Eigen_traits_3::SparseMatrix SparseMatrix;
 
 
+struct Heat_method_3_private_tests {
+  
 #if 0
 void source_set_tests(Heat_method hm, const Idt& sm)
 {
@@ -37,7 +41,6 @@ void source_set_tests(Heat_method hm, const Idt& sm)
   hm.add_source(source);
   assert(*(hm.sources_begin()) == source);
   assert(hm.remove_source(source));
-  assert((hm.get_sources()).empty());
   assert(hm.add_source(*(vertices(sm).first)));
   assert(*(hm.sources_begin()) == source);
   assert(hm.add_source(*(std::next(vertices(sm).first,3))));
@@ -171,3 +174,11 @@ int main(int argc, char*argv[])
 
   return 0;
 }
+
+};
+
+int main(int argc, char*argv[])
+{
+  Heat_method_3_private_tests tests;
+  return tests.main(argc,argv);
+}
diff --git a/Heat_method_3/test/Heat_method_3/heat_method_surface_mesh_test.cpp b/Heat_method_3/test/Heat_method_3/heat_method_surface_mesh_test.cpp
index 7ae6b7e6041..787b1bbb889 100644
--- a/Heat_method_3/test/Heat_method_3/heat_method_surface_mesh_test.cpp
+++ b/Heat_method_3/test/Heat_method_3/heat_method_surface_mesh_test.cpp
@@ -203,9 +203,9 @@ int main()
 
 };
 
-  int main()
-  {
-    Heat_method_3_private_tests tests;
-    return tests.main();
-      
-  }
+
+int main()
+{
+  Heat_method_3_private_tests tests;
+  return tests.main();
+}